/Engine/Source/Runtime/Landscape/Classes/LandscapeComponent.h
void GetUsedPaintLayers ( const [FGuid](API\Runtime\Core\Misc\FGuid) & InLayerGuid, [TArray](API\Runtime\Core\Containers\TArray)< [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) * > & OutUsedLayerInfos ) const